Question

tg 3п/4 - sin 7п/6 =

Answer 1

=tg ( П-П/4) - sin ( П+П/6)=- tgП/4-(-sinП/6)=-1+1/2=-0,5

Answer 2

$tg frac{3*pi}{4}-sin frac{7*pi}{6} =-1-(- frac{1}{2})=-1+frac{1}{2}=-0,5$
1) $tg frac{3*pi}{4}=tg(pi-frac{pi}{4})=-tg (frac{pi}{4})=-1$
2) $sin frac{7*pi}{6}=sin(pi+ frac{pi}{6})=-sin (frac{pi}{6})=- frac{1}{2}$